Brake-shoe.



G. S. EVANS.

BRAKE SHUE.

' APPLIOATIOH MLB SEPT. '8, 191s. 1,085,555.

1 w. ,H rrd Patented Jan 27, 1914 3 SHEETS-SHEET 1.

.w di M G. S. EVANS.

BRAKE SHOE. APPLICATION MLPD SEPT. 6, 1913.

1,085,555. Patented .13.11.27, 1914i 3 SHEETS-SHEET 2.

c. s. EVANS.

BRAKE SHOE.

APPLIOATIUN FILED SEPT. 6, 1913.

1,085,555. Patented Jain.27,1914.

s SHEETS-SHEET a.

v' f W GEORGE s. EVANS, or. LENOIR CITY, TENNESSEE.

BRAKE-SHOE.:

Specication of Letters Patent.

PatenteaJan. 27, 191.4.

Application filed September 6, 191.3. Serial No. 788,397.

To all whom it may concern: v

Be it `known that I, GEORGE S. EVANS, a

I' citizen of the United States, residing at Lenoir City, in the county of Loudon and State of Tennessee, have-invented new and useful Improvements in Brake-Shoes, of

. which the following is a specification.

This 'invention relates to improvements in brake shoes for railway .trains and especially with reference to improvements in brake shoes of the composite type in which the body of the shoe is made of cast iron and is provided with a steelreinforcing back onto which the body is 'cast during the process of the manufacture of the shoe, and also in whibh the body of `the shoe is provided with a suitable number of inserts, preferably of nickel-chrome chilled steel so that the shoe is provided with a braking surface made up of a combination of metals havmg different frictiona-l efficiencies, producmg a shoe of maximumwear and braking qualities'and' enabling the shoe to4 secure certain desired results such as dressing the tread and flange of the wheel at points not worn by the rail,'and thus retaining to a marked extent the original contour' of. the rim of the wheel, the invention being adapted for use in the lconstruction of steel back brake shoes designed for use upon steel or st eel, tired locomotive driving wheels and belng also adapted for use in steel back brake shoes for use on passenger and freight railway cars; the object of the invention being to provide an ,improved brake shoe embodying a steel or other metallic backing and a cast body in which the backing is embedded, possessing the maximum of safety and allowing for the maximum wear ofthe brake shoe and which will otherwise meet the other requirements set forth in the specication covering this class of device adapted by the Master'Car Builders Association.

- l/Vithv the above and other objects in view the invention consists in the construction, combination and arrangement of devices hereinafter described and claimed.

In the accom anying drawings: Figure 1 is a rear plan oav composite brake shoe constructedl in accordance with my invention and especially adapted for use'upon a steel or steel tired locomotive 'driving wheel. Fig. 2 is a vertical Y transverse sectional view of the same on the plane indicated by the line 1i-av of F-ig. 1. Fig. 3 is a similar preferably made of view on the of Fig. 1. Fig. 4 is a longitudinal sectional plane indicated by the line b--b view of the same on the plane indicated by j ,the line c-c of Fig. 1. Fig. 5 is a similar plane indicated by the lire alf- Fig. 6 is a plan of a blank from view on the of Fig. 1.

which the back of my improved brake. shoe is formed.

Fig. 7 is a front plan orele vation of my improved shoe. Fig. 8 is a detail transverse sec-tional view of a modified construction of the back. Fig. 9 is a vertical transverse vsectional view of a form of' brake shoe constructed in accordance withV my invention and especially adapted f or4 "use on a passenger or freight car wheel. Fig. 10 isa detail transverse sectional view plan i of the back of said shoe. Fig. 11 is a of the back. Fig. 12 is a plan of the blank from which the said back is formed.

Referring first to the form of my invention shown in Figs. 1 to 8, inclusive, and in which the brake' shoe especially constructed for use upon a steel or steel tired loco-A motive driving wheel I provide in accordance with my invention a back 1 which is which is preferably made of 'cast iron and which body is cast onto and around the perplate steel, a body 2 forated back sothat the latter becomes embedded therein, and inserts 3 embedded in the body of the shoe and exposed at the' braking surface thereof, these inserts being of any suitable number, arranged at suitable points and `being preferably made of nickel-chrome chilled steel.

The back is made from a blank A, such as shown in-Fig. 6 and comprising a pair of straight parallel spaced arms 4 and 5 and a connecting bar 6 which is arranged medially of the arms 4 and 5. The arm 4A is wider than the arm 5 and is formed at its outer. side with dove-tailed recesses 7, the

arm- 5 being formed with similar recesses 8 on its inner side. In the ends of the armV 4 are dove-tailed recesses 9 and in the ends of the arm 5 are notches 10, formed vby integral lugs 11 which are inturned from the said arm. The inner side of the arm 4 of the blank is formed with alternately arranged doveta-iled projections 12 and recesses the latter adapted to fit in the recesses 13 of .13 and the outer side of the arm 5 is formed l said arm 4 as more fully hereinafter described. The said arms 4 and 5 are also provided with suitable openings 16.

In constructing a back .for one of my brake shoes from one of the blanks hereinbefore described the arm 4 is bent anticlockwise through an angle of 90 on the line .ef-e, thearm 5 is bent in the same direction through an angle' of 90 on the line f-f and the cross or connecting bar 6 is bent through an angle of 90 on each of the lines g-g in such manner as to bring the arms 4 and 5 side by side, in contact with eachother and interlocked with dovetail projections 12 engaging the recesses 14 and the projections 15 engaging the recesses 13 so that the said arms 4 and 5 are thus firmly and securely locked together. Such bending of the bar-6 causes the same to form the attaching lug or eye 17 of the finished brake shoe. After'the blank has been thus bent to interlock the arms '4 and 5- and form the attaching eye` or lug, the blank isthen pressed by means of suitable dies orforged or' otherwlse formed into a finished back and curved lengthwise to conform to therequired curvature of the body, to lit on the,

periphery of ,a Wheel and is also curved transversely to conform to. the ange portion ofA the cast shoe and lif desired, the blank may also be corrugated as at 18 in Fig. '8 for the purposeof strengthenin the corrugatingportions of the back. i en `the back has thus beeirformed the, body portio1i'2' of the shoe is cast ltherein and in la suitable mold, so that the back becomes embedded in the rear side of the body, and portions ofthe body iiowinto and till the openings 16yin the back and hence the back and. bodyare Iirmly united, and each strengthens the other. While casting the body of the .shoe the inserts 3, offnickel-chrome chilled steel are cast and embedded therein.

Referring especially-to the form of my invention shown in Figs. 9, 10, and 11, in which the brake shoe isadapted for use on a passengeror freight car wheelthe back 19 is formed from a blank B such as shown in detail in Fig. 12, the said Iblank comprisingfa` pair of arms 20 spaced apart and arranged parallelwith each other, and an integral bar 21 which connects the centers of the said arms.V The arms 20 are formed With` triangular notches 22` at opposite sides. of the ends of the bai-'21 so that the latter is caused'to extend nearly halfway across the arms 20. f The'said arms are .provided in their outer sides with doveLtailed recesses 23 and are provided at their opposing inner sides with matching dove-tail projections 24 and'recesses 25 so that when the bar 21 is or lug.

bent on the line h.-h to dispose its end or-V tions-parallel with'each other and bent rom the arms 20, at right angles thereto and on the lines i-c the said dove-tailed projections 24-are caused to engage in the recesses 25 and thereby lock thel inner edges of the arms 20 together as shown in Fig. 11. The bent bar 21 is thus caused to form the attaching eye or lug 26 of the brake shoe.

The body 27 of the brake shoe is made of cast .iron and cast 4onto the back, so that the latter becomes embedded in the body, and

the said lbody is cast with bosses 28 which' project from its rear side and inwhich the angles or sides of the" lug or eye26, where the same is united to the ibody, so that the said bosses serve to greatly strengthen the stood.

While I haveherein shown and described two forms of my invention I .Would-have it understood that other y changes may be made said attaching eye or lug as 'will be under'- without departing from the spirit of myinvent-ion and withinthe scope of the appended claims.

Having thi s described myinventio'n, I claim:`

1. A brake shoe back comprising a pair of arms having interengaging edges, and a" connecting portion between said larms andforming an attaching eye o r lug. 4 2. A brake -shoe back comprlsing a pair of arms having opposing edges interlocked from end to end and a connecting portion between said arms, spanningthenterlocked edges thereof and forming an attaching eye.

3. A brakesho'e back comprising a pair* of arms dove-tailed together and a bar connecting said arms" and also taching eye or lug. 4. A brake shoe lforming an atbackicomprising a pair j of arms anda connecting portion between said arms, andformingan attaching eye or lug, said armshavin'gopposing .edges and integral means 1n the common plane of and to lock said edges-togethenf 5. A blank forforming aback for a brake shoe, said blankccniprising Ea pair- 'of spaced arms having lmatching edgesy adapted to interlock when said arms arebrought together and a'bar integrahwith andconnecting said arms and adapted tobe bent to form an at-v taching eye orlug.-

In testimony whereof AI* aiixmy signature in presence of two, witnesses.

Witnesses: Y f w W. Gr. SMITH, 1 I J. W. Busan-n, Jr.-v

09N 0! this patent may be obtained tor Ave cents each, by dressin the Cminissicne'r ot .Patentn y washington. n. c. i v j p 

